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Module 14: Concurrency and Multithreading

Write thread-safe Java code using executors, synchronization primitives, and CompletableFuture.

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Lesson list

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Create threads responsibly and understand their states.

Use synchronized blocks, ReentrantLock, and volatile fields correctly.

Coordinate complex thread interactions using Condition objects and atomic variables.

Manage thread lifecycles with Executors, ScheduledExecutorService, and ForkJoinPool.

Compose async tasks, handle errors, and combine results with CompletableFuture.

Identify race conditions, deadlocks, livelocks, and starvation.

Implement a downloader that fetches files concurrently, supports pauses, and reports progress.